JSF - Mostrar tabla de datos

h: la etiqueta dataTable se usa para mostrar datos en forma tabular.

Etiqueta JSF

<h:dataTable value = "#{userData.employees}" var = "employee"
   styleClass = "employeeTable"
   headerClass = "employeeTableHeader"
   rowClasses = "employeeTableOddRow,employeeTableEvenRow">
   
   <h:column>    				
      <f:facet name = "header">Name</f:facet>    				
      #{employee.name}
   </h:column>
   
   <h:column>
      <f:facet name = "header">Department</f:facet>
      #{employee.department}
   </h:column>
   
   <h:column>
      <f:facet name = "header">Age</f:facet>
      #{employee.age}
   </h:column>
   
   <h:column>
      <f:facet name = "header">Salary</f:facet>
      #{employee.salary}
   </h:column>
</h:dataTable>

Salida renderizada

<table class = "employeeTable">
   <thead>
      <tr>
         <th class = "employeeTableHeader" scope = "col">Name</th>
         <th class = "employeeTableHeader" scope = "col">Department</th>
         <th class = "employeeTableHeader" scope = "col">Age</th>
         <th class = "employeeTableHeader" scope = "col">Salary</th>
      </tr>
   </thead>
   
   <tbody>
   <tr class = "employeeTableOddRow">
      <td>John</td>
      <td>Marketing</td>
      <td>30</td>
      <td>2000.0</td>
   </tr>
   
   <tr class = "employeeTableEvenRow">
      <td>Robert</td>
      <td>Marketing</td>
      <td>35</td>
      <td>3000.0</td>
   </tr>
</table>

Atributos de etiqueta

Aplicación de ejemplo

Creemos una aplicación JSF de prueba para probar la etiqueta anterior.

styles.css

.employeeTable {   
   border-collapse:collapse;
   border:1px solid #000000;
}

.employeeTableHeader {
   text-align:center;
   background:none repeat scroll 0 0 #B5B5B5;
   border-bottom:1px solid #000000;  
   padding:2px;
}

.employeeTableOddRow {
   text-align:center;
   background:none repeat scroll 0 0 #FFFFFFF;	
}

.employeeTableEvenRow {
   text-align:center;
   background:none repeat scroll 0 0 #D3D3D3;
}

Employee.java

package com.tutorialspoint.test;

public class Employee {
   private String name;
   private String department;
   private int age;
   private double salary;
   private boolean canEdit;

   public Employee (String name,String department,int age,double salary) {
      this.name = name;
      this.department = department;
      this.age = age;
      this.salary = salary;
      canEdit = false;
   }

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }

   public String getDepartment() {
      return department;
   }

   public void setDepartment(String department) {
      this.department = department;
   }

   public int getAge() {
      return age;
   }

   public void setAge(int age) {
      this.age = age;
   }

   public double getSalary() {
      return salary;
   }

   public void setSalary(double salary) {
      this.salary = salary;
   }

   public boolean isCanEdit() {
      return canEdit;
   }

   public void setCanEdit(boolean canEdit) {
      this.canEdit = canEdit;
   }	
}

UserData.java

package com.tutorialspoint.test;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name = "userData", eager = true)
@SessionScoped
public class UserData implements Serializable {
   private static final long serialVersionUID = 1L;
   private String name;
   private String dept;
   private int age;
   private double salary;
   private static final ArrayList<Employee> employees
      = new ArrayList<Employee>(Arrays.asList(
      new Employee("John", "Marketing", 30,2000.00),
      new Employee("Robert", "Marketing", 35,3000.00),
      new Employee("Mark", "Sales", 25,2500.00),
      new Employee("Chris", "Marketing", 33,2500.00),
      new Employee("Peter", "Customer Care", 20,1500.00)
   ));	


   public ArrayList<Employee> getEmployees() {
      return employees;
   }

   public String addEmployee() {		 
      Employee employee = new Employee(name,dept,age,salary);
      employees.add(employee);
      return null;
   }

   public String deleteEmployee(Employee employee) {
      employees.remove(employee);		
      return null;
   }

   public String editEmployee(Employee employee) {
      employee.setCanEdit(true);
      return null;
   }

   public String saveEmployees() {
      
      //set "canEdit" of all employees to false 
      
      for (Employee employee : employees) {
         employee.setCanEdit(false);
      }		
      return null;
   }
   
   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }

   public String getDepartment() {
      return department;
   }

   public void setDepartment(String department) {
      this.department = department;
   }

   public int getAge() {
      return age;
   }

   public void setAge(int age) {
      this.age = age;
   }

   public double getSalary() {
      return salary;
   }

   public void setSalary(double salary) {
      this.salary = salary;
   }
}

home.xhtml

<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns = "http://www.w3.org/1999/xhtml"   
xmlns:h = "http://java.sun.com/jsf/html"
xmlns:f = "http://java.sun.com/jsf/core">
   
   <h:head>
      <title>JSF tutorial</title>		
      <h:outputStylesheet library = "css" name = "styles.css"  /> 	
   </h:head>
   
   <h:body> 
      <h2>DataTable Example</h2>
      
      <h:form>
         <h:dataTable value = "#{userData.employees}" var = "employee"
            styleClass = "employeeTable"
            headerClass = "employeeTableHeader"
            rowClasses = "employeeTableOddRow,employeeTableEvenRow">
            
            <h:column>    				
               <f:facet name = "header">Name</f:facet>    				
               #{employee.name}
            </h:column>
            
            <h:column>
               <f:facet name = "header">Department</f:facet>
               #{employee.department}
            </h:column>
            
            <h:column>
               <f:facet name = "header">Age</f:facet>
               #{employee.age}
            </h:column>
            
            <h:column>
               <f:facet name = "header">Salary</f:facet>
               #{employee.salary}
            </h:column>
         </h:dataTable>
      </h:form>
   
   </h:body>
</html>

Una vez que esté listo con todos los cambios realizados, compilemos y ejecutemos la aplicación como lo hicimos en JSF - Capítulo Primera aplicación. Si todo está bien con su aplicación, esto producirá el siguiente resultado.